By M. A. K. Khalil (auth.), M. A. K. Khalil (eds.)
Methane performs many vital roles within the earth's setting. it's a effective "greenhouse fuel" that warms the earth; controls the oxidizing ability of the ambience (OH) not directly affecting the cycles and abundances of many atmospheric hint gases; presents water vapor to the stratosphere; scavenges chlorine atoms from the stratosphere, terminating the catalytic ozone destruction by way of chlorine atoms, together with the chlorine published from the man-made chlorofluorocarbons; produces ozone, CO, and CO2 within the troposphere; and it's an index of existence on the earth and so is found in larger amounts in the course of hot interglacial epochs and dwindles to low degrees in the course of the chilly of ice a while. by way of all measures, methane is the second one merely to CO2 in inflicting destiny international warming. The ebook offers a finished account of the present knowing of atmospheric methane, and it really is an finish aspect for summarizing greater than a decade of in depth learn at the international resources, sinks, concentrations, and environmental function of methane.
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Additional resources for Atmospheric Methane: Sources, Sinks, and Role in Global Change
Cycles, 2:399-409. S. Reeburgh. 1992. Interannual variations in tundra methane emission: a four-year time series at fixed sites. Global Biogeochem Cycles, 6:139-159. , E. Faber. 1985. Methane oxidation in sediment and water column environments - isotope evidence. Adv. Org. , 10:759-768. , E. Faber, M. SchoeH. 1986. Biogenic methane formation in marine and freshwater environments: CO2 reduction vs. acetate fermentation - isotopic evidence. Geochim. Cosmochim. Acta, 50:693-709. , E. Faber, M. SchoeH.
The observation of possible CH 4 changes related to the climatic events of the past 1000 years (Little Ice Age, Medieval Warm Period) is currently supported only by measurements of Rasmussen and Khalil (1984). These data 49 were re-analyzed and suggest the possibility of a drop of about 40 ppbv compared to the mean pre-industrial level, during the time of the Little Ice Age (Khalil and Rasmussen, 1989). If true, this observation implies that the natural CH4 cycle can be influenced by climatic changes on a secular time scale.
KB. M. Hartman, RC. l. Sebacher, R Pelletier-Travis, D. D. P. Brannon. 1989. Methane emissions from the Florida Everglades: Patterns of variability in a regional wetland ecosystem. Global Biogeochem. Cycles, 3:363-374. M. Crill, RL. Sass, RC. B. Dise. 1992. Methane emissions from tundra environments in the Yukon-Kuskokwim delta, Alaska. 1 Geophys. , 97:16,645-16,600. M. 1982. The derivation of fluxes from profiles in perturbed areas. Boundary-Layer Meteorology, 24:35-56. , H. Dorr, 1. Levin. 1990.